Mountain Home Air Force Base is a United States Air Force (USAF) installation in the western United States. Located in southwestern Idaho in Elmore County, the base is twelve miles (20 km) southwest of Mountain Home, which is forty miles (65 km) southeast of Boise via Interstate 84. The base is also used by the Republic of Singapore Air Force (RSAF), which has a detachment of F-15SG combat aircraft on long term assignment to the base and a squadron composed of RSAF and USAF personnel.

Elmore County is a county in the U.S. state of Idaho. As of the 2020 census, the population was 28,666. The largest city and county seat is Mountain Home.